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11 June, 18:52

Bill wants to see how many times he needs to roll a standard number cube before getting a 5. What is the probability that Bill will roll a 5 on his third roll and not before?

a. 125/1296

b. 25/216

c. 1/6

d. 1/2

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Answers (1)
  1. 11 June, 20:49
    0
    5/6 • 5/6 • 1/6 = 25/216 the answer is b
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